I run Debian and when I try to start a video session, the "codecs-ready" property never turns to TRUE?

Debian maintainers think they're smarter then the upstream maintainers and use their own copy of ffmpeg instead of the one provided by gst-ffmpeg. They forgot to disable ffenc_libtheora (which is broken). They know about this problem, but have yet to fix it. Solution: use a better distribution or remove the gstreamer0.10-ffmpeg package.